12. Cymbidium iridioides D. Don, Prodr. Fl. Nepal. 36. 1825.
黄蝉兰 huang chan lan
Cymbidium giganteum Wallich ex Lindley, nom. illeg.; Cyperorchis gigantea Schlechter, nom. illeg.; Iridorchis gigantea Blume, nom. illeg.
Plants epiphytic, autotrophic. Pseudobulbs ellipsoid-ovoid to narrowly ovoid, bilaterally flattened, 4-11 × 2-5 cm, partially enclosed in leaf bases. Leaves 6-10, lorate, 45-70(-90) × (1.6-)2-4 cm, articulate 6-15 cm from base, apex acute. Inflorescence arising from within sheaths at base of pseudobulb, suberect or spreading horizontally, 40-70 cm or longer; rachis 3-17-flowered; floral bracts subtriangular, 2-3 mm. Flowers fragrant, 9-10 cm in diam.; pedicel and ovary 40-45 mm; sepals and petals yellowish green, with 7-9 brownish or reddish brown longitudinal stripes; lip yellowish, with reddish brown stripes on lateral lobes and similarly colored mottling on mid-lobe. Sepals narrowly obovate-oblong, 37-45 × 12-15 mm, apex acute. Petals slightly falcate, narrowly ovate-oblong, 35-46 × 7-9 mm, not twisted, apex acute; lip ovate-triangular, slightly shorter than petals, base fused to basal margins of column for 4-5 mm, 3-lobed; lateral lobes shortly ciliate; mid-lobe strongly recurved, margin erose and undulate; disk sparsely hairy, with 2 central lamellae extending to base of mid-lobe, lamellae thickened and with long hairs from midway along their length to their apices. Column arcuate, 25-29 mm, shortly hairy at base on ventral surface; pollinia 2, subtriangular. Capsule subellipsoid, 60-110 × 30-45 mm. Fl. Aug-Dec, fr. Feb-Apr. 2n = 40, 80.
Trees or rocks in forests or thickets, shaded cliffs; 900-2800 m. SW Guizhou, SW Sichuan, SE Xizang, NW to SE Yunnan [Bhutan, India, Myanmar, Nepal, N Vietnam].